A theologian, graduated at program “Diploma in Safeguarding” and “Licentiate in Safeguarding” at Centre for Child Protection, Rome. Together with Josip Bošnjaković had several lectures and workshops for seminarians, priests, and religious teachers within the area of Safeguarding.
The Center for Fostering the Wellbeing of Vulnerable Persons was established at the Catholic University of Croatia in march 2021, where Šijaković is currently employed. The primary activity of the Center is prevention, education with the aim to raise awareness and increase sensitivity to recognizing violence, abuse, and neglect and developing skills for reporting.
Šijaković participated in radio and TV shows working on the popularization of the importance of abuse prevention. Member of the Commission for the Protection of Minors and Vulnerable Persons at the Croatian Catholic Bishops Conference and the Metropolitan Office of the Đakovo-Osijek Church Province.